Lateral-motion car-truck.



W. H, WILSON.

LATERAL MOTION GAR TRUCK.

AIf PLIGATION FILED JUNE 23, 1913.

Patented Feb. 3, 1914.

11 N, 4 M B9 hisAHornqgs Inventor a/m W v 02 on Fig. 1, some parts beingbroken fragmei UNITED STATES PATENT UFFICE.

' WILLIAM H. vvILsoN, or ST. PAUL, MINNESOTA.

LATERAL-MOTION cnarriwcx.

Application filed June 23,

able others skilled in the art'to which ita-ppertains' to make and usethe same.

My present invention relates to cartruck's of the type wherein provisionis made for lateral motion, of the car body in respect to the truckframe, and is'directed to an improvemcnt on a form of lateral motion.de-

vices disclosed and claimed in my co-pending application, Serial Number775,198, filed of date, June 23rd, 1913, and entitled Lateral motion cartruck.

The general purposes of a lateral motion device of this character arefully set forth in the introductory part of mysaid co-pend ing.application, and also, in my prior Patout No. 1,057,990, of date, April1st,; 1913,

also entitled Lateral motion car truck.

In the "accompanying drawings which illustrate the present invention,like characters indicate-like parts throughout the several views.

Referring to the drawings, Figure 1 is a view in side elevation, showingQ6114...-

of a car truck having my invention incorporated therein, some parts being sectioned; Fig. :2 is a transverse vertical section taken throughthe truck on the'line away; and is a detail view in elevation showingone of the lateral motion rockers on a much larger scale than the otherviews. 1

In so far as my present invention is concerned, the truck frame may beof any approved construction or suitable type; The same statement istrue in respect to the truck bolster. In the particular form of thetruck illustrated, however, the numeral 1 indicates the truck sideframes, which includes saddle plates 2 and columns 3. n Fig. 1, thecolumn bolts are not shown, but will be applied in the usual way; Thetruck bolster is indicated as an entirety by the numeral 4. Thisbolster,a's is 'usual in this type of truck, works between the cel umns3 and is provided with su table stops 5 that are spaced transversely 5the trunk Specification of Letters Patent.

2 sea-ted in suitable Patented Feb. 3,1914. um. Seria1No.775,19. 1

a distance greater than the transverse width of the columns, so thatthey are adapted to engage the column 3 to limit the endwise movementsof the truck bolster transversely of the truck.

Groups of coiled springs 6, as shown, four in each group, are suitablyseated in the saddle plates 2 of the truck side frames, and each groupof,springs supports a so-called lower rocker bearing 7. These rockerbearings 7 are provided, between the inside and outside springs 6, withdepending pockets '8. The said rocker bearings 7 are guided for verticalmovements on the columns 3:, so

that while they are free to move vertically, in respect to the truckside frames, they will partake of the lateral moYements of the truckframe.

Upper rocker 9 are, as shown,

figlckets in the ends'of the bolster 4, that t,

ey partake of the ver- 'tical movements of 'sa-i d bolster, and also ofthe lateral movements thereof, that'is, the endwise movements of "saidbolster, transversely of the truck. L

Three-point xrockerslO; which are integral or solid near structures, areinterposed between the lower bearings 'Z and upper bearings 9. Theserockers 10. are preferably arranged in pairs and their lower ends areseated on the flat bottoms of the which: will be hereinaftemmbresfullyexplained, the inner lugs 11 are extendedto points concentrically higherthan the lugs -11. Also, for an import-ant purpose, the lower ends ofthe lugs 10 are extended on curved lines 12-12 The radius of theoutwardly extended curve 12 .is very much greater than the radius of theinwardly ex tended curve 12,s0 that the former in a direction away fromthe central axis of the rocker spreads or recedes downwardly from,

the obliquely opposite bearinglug 111 much obliquely opposite oute rebearing lug 11.5 1

Fig. 2 illustrates th 'normali op'erative Wll ilttwu Epsitions of theupper and lower rocker armgs and of the' bolster. In this osition, t erockers have the greatest stability, that is, avity reacts with themaximum force to old the said rockers against oscillating movements fromnormal positions.' Stated in another way, these three-point rockerbearings, when in central positions, give the greatest normal stabilityagainst continuous lateral swaying movements to the car body, and thisresistance to lateral movement decreases as the rockers are oscillatedin the one direction or the other from their normal or centralpositions.

When the rockers 10 are oscillated, there is a traveling or rollin enagement between the lower ends the in tie bottoms of the pockets 8 ofthe lower rocker bearings 7. When the car, travelin a curve at speedsulliciently high to pro uce a thrust of the flanges of the outer wheelsagainst the outer rails of the curved track section, the car body willbe thrown outward by centrifugal force, for example, in the direction ofthe larger arrow marked on Fig. 2, and this will cause the relativelyhigh lug 1 1 of the outer rocker to become the supportingmember at thatside, and the relatively low lug 11 of the inside rocker to become thesupporting lug for that end of the bolster which is at the inner side ofthe curve. The obvious result of this will be to raise that end of thebolster, which is at the outer side of the curved track, much faster ormore in extent than the oppositeiorl inside end of the said bolster. Thewell known reason for raising the outer rail of a curved track higherthan the inner rail is to overcome, to a considerable extent, theobjectionable outward thrust of the car'body due to centrifugal force'intraveling a curved track at high speed; and it is evident that thisaccelerated rise of the so-called outer end of the bolster, produced bythe differentially and reversely acting rockers, further assists inaccomplishing the above noted desired result. It is also evident thatthe above described acti n on the bolster will be transmitted to tli ecar body which is carried on the truck bolster. In fact, the bolster ina broad sense, is a body member supported by the rockers, and, in oneway or another, sup porting the carbody proper.

It is, of course, evident that the reversed arrangement of thedifferentially acting rocker' produces a like action on the one side 0the other of the car running on tracks which curve either to the rightor to the left, the accelerated rise being in either case at that end ofthe bolster which isto- Ward the outer side of the curved track,

The above accelerated action is further in creased by the differentiallycurved portions on the lower ends of the rockers. Jim root surface 12 ofthe relatively small rockers having,

curve and the obliquely opposite relatively low lug 11 of the one rockerwill be thrown into action and the foot surface 12 or relativelylargercurve will be thrown into action when the relatively high lug 11"is thrdwn into action. Of course, in view of the reversed arrangement ofthe rockers, the said ortionsi11-12 of the one rocker will be t rowninto action when the said portions 11'-12 of the other rocker are throwninto action.

With the construction above described, a very highly desirable lateralmotion device, meeting the various requirements of the railway service,is provided. By roviding the lower bearing member 7 with pocketsdepressed between the springs, it is made possible to use long rockersand at the same time, to keep the truckl er or other body member, andthe car "a" very low down.

For some purposes, ufl for instance, as for slow speeds in freightservice, it may be found advisable to reverse the arrange ment of therockers shown in Fig. 2, that is, to place the said rockers with theirrela- 'tively high bearinglugs 11 outward.

What I claim is: 1

1. The combination with a truck frame and a body member, of lower rockerbearings sprin supported on said truck frame and parta ing of thelateral movements thereof, upper rocker bearings partakin of the lateralmovements of said body mem er,

.and rockers interposed between said u per and lower rocker bearings,said rockers av ing. at one end. normally engaged bearin surfaces ofdifferent projection arranged to raise said body member to one extentunder one movement of the rocker, and another extent under anothermovement of said rockers.

2. The combination with a truck frame and a body member, of lower rockerbearings spring-supported on said truck frame and partaking of thelateral movements 11o thereof, upper rocker bearings partaking of thelateral movements of said body member, and solid rockers interposedbetween said upper and lower rocker bearings, said at one end, normallyengagedbearing surfaces of different projec tion arrangedto raise saidbody member to one extent under one movement of the rocker, and anotherextent under another movementi of said rockers, and the rockers at theopposite side of the truck being reversely arranged 'so that when saidbody member is moved laterally or transversely ofthe truck, one sidetl-iereof will be raised faster andto a greater extent than the other.

3. The combination with a truck frame and a body member having a lateralmove.- ment in respect ll1l'i"-'Iu. of lower rocker bearings partakingof the lateral movement of said truck frame, upper rocker bearingsmaiatuilallllllltwl i i partaking of the lateral movements of said bodmember and threeoint rockers v 3 P posed betweensaioa upper andlowerrocker bearin s said rockers at one -end havin r: a 7 7 a normall en 'aed bearin lu s one ro- D U D 7 v jected' vertically more than the other,and

the rockersiit the opposite sides of the truck bein reversel arran edWhereb said bod mom or when moved laterally or trans versely- 'ofthetruck, will be raised faster and to a greater extent at one side of the"truck than at the other.

'- 4.'The combination with truck irame' and a body member having alateral movement in respect thereto, of lower rocker bearlngs partakingof the lateral movements of said truck frame, upper rocker bearingspartaking of the lateral movements of said body member, and solidrockers interposed between said upper and lower rocker bearings at theopposite sides of the truck, said. rockers, at their upper ends, havingbearing lugs, one raised higher than the other, and, having at theirlower ends, difi'erentially curved bearing surfaces, and the rockers atthe opposite sidesof the truck being reversely arranged, whereby, whensaid body I member is moved laterallv or transversely of the truckframe, one side thereof Willbe raised faster and to a greater extentthan the other.

5. The combination with a truck frame and a body member having lateralmovement in respect thereto, of groups of springs supported on the sidesof said truck frame, lower rocker bearings mounted on said groups ofsprings and having pockets which dependbetween the inner and outersprings, upper rocker bearings partakingpf the vertical and lateralmovements oi...-said body member, anti solid three-point rockers intenposed between said upper and lower rocker bearings and having" at theirupper ends inner and outer lugs, the former of which are raised higherthan the latter, and both of ing at their upper ends which normallyengage said upper rocker bearings, substantially described 6. Thecombination with a truck frame and a. body member having; a lateral movement in respect thereto, of groupsof s gs is'u orted on the sides ofsaid truolr iraine lower rocker bearings mounted on said groups ofsprings and having pockets which depend between the inner and outersprings, upper rocker bearings partaking oi the verheal and lateral-1novoments of said body member, and solid three-pt t rockers hayandenter bearing lugs, the former of Willi. 1 are raised higher than thelatter, and having their lower ends dili'eren tially curved bearingsurfaces that engage the bottoms of the poohets of said lower rockerbearings, the hear ing surfaces of smaller curve being located obliquelyopposite to the relativeiy low outer bolsters, so

truck frame being reversely arranged, substantially as described.

The combination with a truck frame and a bolster, of lower rockerbearings supported by and partaking of the lateral move ments of saidtruck frame, upper rocker bearings applied-to the ends of said bolsterand partaking of the vertical and endwise movements thereof, andthree-point rockers interposed between said upper and lower bearings,said rockers at their upper ends having normally engaged lugs, oneraised higher than the other and'both normally engaging said upperrocker bearings, the rockers at opposite sides ofthe truck frame beingreversed, whereby said bolster, when moved transversely the truck, willhe raised faster and to a greater extent at one end than at the other.

8. A lateral motion device for car truck bolsters, comprising a rockablebolster-supporting member arranged parallel with the vertical plane inwhich the bolster moves and being so designed that it will raise thebolster hi "when it rocks laterally in one direction than when it rockslaterally in the opposite direction. v

9. A lateral moti n device for car truck n5 prising rochable boiter-snpilrr with the so paral uitiereni portions t Q more hols memberrocks in oppr upwardly te ln'ec- 10. 1h lnwiai motion device for cartruck bolsters, comprising roe-liable porting men 3 two branch la i thefill i i tions being the one Wi l of upward movement to the said otherportion imparts to the bole is the bolster movesiaterally in theopposite direction.

11. it la ral'inotion device for car truck bolsters, ipr' i s roolrablebolster-sup 12g porting n' crnb 111;; arms that bran. l

rally rrom the fulcrumpoint of said said arms being so designed and a1anged the m ddle ordinate of the described b one arm is greater than themiddle ordinate of the described by the other arm. later i motion d isinax ject laterelly in OPPOSIDG GQGCtiOIIS from the fulcrum point of saidmember, one of said arms hem? longer than the other.

13. Alatere motion device for car truck bolsters, C011! rising arockable bolster-supporting mem part a greater degree of upwardmovenlentto the bolster'when it operates thanthe longer arm imparts to thebolster when it 15 operates.

14. A lateral motion device for car truck r having two arms that r0 iectlaterally in op fiosite directions mm bolsters, .com rising rockablebolster-su porting memliers arranged between a under side of the bolsterand a supporting structure and designed in such a manner that the causethe outer end of the bolster to raise igher or move upwardly a aterdistance than the inner end of the olster when the bolster moveslaterally in rounding a curve. l v

In testimon whereof I afiixmy signature in presence 0 two witnesses.

WILLIAM H. WILSON. Witnesses-1 A. J. PEARSON,

' JOHN E. Hmcornnn.

